AST 205 Midterm WITH ALL ANSWERS
2025
the mean Sun- earth distance of 149 M km, Plutos orbit 40 AU-CORRECT ANSWERS✔✔AU Astronomical
unit
4.2 light years-CORRECT ANSWERS✔✔distance of Proxima Centauri
9.46 x 10^15 meters-CORRECT ANSWERS✔✔one light year
3.26 light years-CORRECT ANSWERS✔✔one parsec
100,000 light years-CORRECT ANSWERS✔✔diameter of Milky Way
24,000 ly-CORRECT ANSWERS✔✔How far are we from the center of the Milky Way?
400 billion, the sun is only one of them-CORRECT ANSWERS✔✔how many stars does the Milky Way
have
Orion-cygnus arm-CORRECT ANSWERS✔✔our solar system is in the
2.5m light years-CORRECT ANSWERS✔✔distance to Andromeda galaxy is
12 million ly-CORRECT ANSWERS✔✔distance to m81 galaxy
326 million light years-CORRECT ANSWERS✔✔distance to coma supercluster
100k galaxies in 500 groups-CORRECT ANSWERS✔✔our home, laniakea supercluster has how any
galaxies in how many groups
20 billion ly away-CORRECT ANSWERS✔✔most distant galaxy is how far away
the moon-CORRECT ANSWERS✔✔small bump on the side of Earth is what from the lecture
it is about 200 times larger-CORRECT ANSWERS✔✔how does the earth to sun distance compare with
the sun's radius
, 8-CORRECT ANSWERS✔✔how many major planets are there with nearly circular orbits
dwarf planets-CORRECT ANSWERS✔✔pluto and ersi are
asteroids/comets-CORRECT ANSWERS✔✔what are much smaller than the major planets and very
numerous
a celestial body that is in orbit around the sun has sufficient mass for its self gravity to overcome rigid
body forces so that it assumes a hydrostatic equilibrium shape, and has cleared the neighborhood
around its orbit. (orbit around sun, mass for self gravity so it has round shape, cleared area around its
orbit)-CORRECT ANSWERS✔✔planet
same as planet but has not cleared the neighborhood around its orbit and is not a satellite-CORRECT
ANSWERS✔✔dwarf planet
all other objects, except satellites, orbiting the sun shall be referred to as these-CORRECT ANSWERS✔✔
small solar system bodies
orbiting planets/ dwarf planets-CORRECT ANSWERS✔✔satellites
direction and nearly in the same plane-CORRECT ANSWERS✔✔planets all orbit in the same
circular-CORRECT ANSWERS✔✔orbits are close to
true-CORRECT ANSWERS✔✔most moons orbit circularly, as do planets and sun
small in mass and size, close to sun, metal and rock, few moons no rings-CORRECT ANSWERS✔✔
terrestrial planets
large mass and size, far from the sun, made of H, He, and hydrogen, rings and many moons-CORRECT
ANSWERS✔✔Jovian planets
99.8% of ss mass, plasma, converts mass to energy, gravity, heat, 4% angular momentum-CORRECT
ANSWERS✔✔sun characteristics
quantitative measure of an objects resistance to acceleration-CORRECT ANSWERS✔✔inertial mass
measure of magnitude of the gravitational force exerted by an object or experienced by an object-
CORRECT ANSWERS✔✔gravitational mass
2.2 pounds-CORRECT ANSWERS✔✔1 kg equals
yes-CORRECT ANSWERS✔✔is inertial and gravitational mass equal
the quantity of 3d space enclosed by some close boundary. measured in meters cubed.-CORRECT
ANSWERS✔✔volume
2025
the mean Sun- earth distance of 149 M km, Plutos orbit 40 AU-CORRECT ANSWERS✔✔AU Astronomical
unit
4.2 light years-CORRECT ANSWERS✔✔distance of Proxima Centauri
9.46 x 10^15 meters-CORRECT ANSWERS✔✔one light year
3.26 light years-CORRECT ANSWERS✔✔one parsec
100,000 light years-CORRECT ANSWERS✔✔diameter of Milky Way
24,000 ly-CORRECT ANSWERS✔✔How far are we from the center of the Milky Way?
400 billion, the sun is only one of them-CORRECT ANSWERS✔✔how many stars does the Milky Way
have
Orion-cygnus arm-CORRECT ANSWERS✔✔our solar system is in the
2.5m light years-CORRECT ANSWERS✔✔distance to Andromeda galaxy is
12 million ly-CORRECT ANSWERS✔✔distance to m81 galaxy
326 million light years-CORRECT ANSWERS✔✔distance to coma supercluster
100k galaxies in 500 groups-CORRECT ANSWERS✔✔our home, laniakea supercluster has how any
galaxies in how many groups
20 billion ly away-CORRECT ANSWERS✔✔most distant galaxy is how far away
the moon-CORRECT ANSWERS✔✔small bump on the side of Earth is what from the lecture
it is about 200 times larger-CORRECT ANSWERS✔✔how does the earth to sun distance compare with
the sun's radius
, 8-CORRECT ANSWERS✔✔how many major planets are there with nearly circular orbits
dwarf planets-CORRECT ANSWERS✔✔pluto and ersi are
asteroids/comets-CORRECT ANSWERS✔✔what are much smaller than the major planets and very
numerous
a celestial body that is in orbit around the sun has sufficient mass for its self gravity to overcome rigid
body forces so that it assumes a hydrostatic equilibrium shape, and has cleared the neighborhood
around its orbit. (orbit around sun, mass for self gravity so it has round shape, cleared area around its
orbit)-CORRECT ANSWERS✔✔planet
same as planet but has not cleared the neighborhood around its orbit and is not a satellite-CORRECT
ANSWERS✔✔dwarf planet
all other objects, except satellites, orbiting the sun shall be referred to as these-CORRECT ANSWERS✔✔
small solar system bodies
orbiting planets/ dwarf planets-CORRECT ANSWERS✔✔satellites
direction and nearly in the same plane-CORRECT ANSWERS✔✔planets all orbit in the same
circular-CORRECT ANSWERS✔✔orbits are close to
true-CORRECT ANSWERS✔✔most moons orbit circularly, as do planets and sun
small in mass and size, close to sun, metal and rock, few moons no rings-CORRECT ANSWERS✔✔
terrestrial planets
large mass and size, far from the sun, made of H, He, and hydrogen, rings and many moons-CORRECT
ANSWERS✔✔Jovian planets
99.8% of ss mass, plasma, converts mass to energy, gravity, heat, 4% angular momentum-CORRECT
ANSWERS✔✔sun characteristics
quantitative measure of an objects resistance to acceleration-CORRECT ANSWERS✔✔inertial mass
measure of magnitude of the gravitational force exerted by an object or experienced by an object-
CORRECT ANSWERS✔✔gravitational mass
2.2 pounds-CORRECT ANSWERS✔✔1 kg equals
yes-CORRECT ANSWERS✔✔is inertial and gravitational mass equal
the quantity of 3d space enclosed by some close boundary. measured in meters cubed.-CORRECT
ANSWERS✔✔volume
